Konuşma Duygu Tanıma için Dikkat Tabanlı Derin Öğrenme ve Metasezgisel Optimizasyonun Hibrit Modeli

Öz

İnsan-bilgisayar etkileşimi alanının önemli bir parçası haline gelen Konuşma Duygu Tanıma (SER) teknolojileri, insan konuşma sinyallerindeki duygusal durumları otomatik olarak algılayan yapay zekâ tabanlı sistemlerdir. Bu sistemlerin çalışma prensibi, ses sinyallerinden çıkarılan akustik özelliklerin makine öğrenimi yoluyla duygusal etiketlerle eşleştirilmesi sürecidir. Önemli ilerlemelere rağmen, mevcut SER teknolojileri hala bazı zorluklarla karşı karşıyadır. Bunların başında yerel ve küresel kalıpların yetersiz temsili gelmektedir. Bu çalışma, duygu temsilinde bu zorlukların üstesinden gelmek için yenilikçi bir hibrit model sunmaktadır. Model iki aşamadan oluşmaktadır. Birinci aşama, duyguların özellik temsillerinin çıkarılması ve bunların duygu etiketleriyle eşleştirilmesiyle uçtan uca bir öğrenme sürecini içeren temel modeli temsil eder. İkinci aşama, özellik optimizasyonunun gerçekleştiği süreçtir. Birinci aşama, yerel özellik çıkarımı, kanal düzeyinde özellik aktivasyonu, zamansal bağımlılık temsili ve son olarak önemli zaman dilimlerine odaklanmayı içeren adımlardan oluşmaktadır. İkinci aşama, altı meta-sezgisel algoritmanın üç makine öğrenimi paradigmasıyla entegrasyonundan türetilen on sekiz farklı optimizasyon konfigürasyonunu kullanarak özellikleri optimize etme sürecidir. Deneyler EMO-DB veri seti üzerinde gerçekleştirildi. 5 katlı çapraz doğrulama yönteminde, önerilen hibrit model, temel modele kıyasla ağırlıksız doğrulukta %7,8'lik bir artış gösterirken, özellik boyutluluğunu %54,8 oranında azaltarak %83,73'lük ağırlıksız doğruluk (UA) elde etti. Bu sonuçlar, önerilen hibrit modelin yüksek doğruluk ve verimli özellik temsilleri sağladığını doğrulamaktadır.

Anahtar Kelimeler

• Konuşma duygu tanıma
• Dikkat mekanizması
• Metasezgisel optimizasyon

Hybrid Model of Attention-Guided Deep Learning and Metaheuristic Optimization for Speech Emotion Recognition

Öz

Speech Emotion Recognition (SER) technologies, which have become a significant part of the human-computer interaction field, are artificial intelligence-based systems that automatically detect emotional states in human speech signals. The working principle of these systems is the process of matching acoustic features extracted from voice signals with emotional labels through machine learning. Despite significant advancements, current SER technologies still face some challenges. Chief among these is the inadequate representation of local and global patterns. This study presents an innovative hybrid model to overcome these challenges in emotion representation. The model consists of two phases. The first phase represents the basic model, which involves an end-to-end learning process with the extraction of feature representations of emotions and their matching with emotion labels. The second phase is the process where feature optimization takes place. The first phase consists of steps including local feature extraction, channel-level feature activation, temporal dependency representation, and finally, focusing on key time periods. The second phase is the process of optimizing features using eighteen different optimization configurations derived from the integration of six meta-heuristic algorithms with three machine learning paradigms. Experiments were conducted on the EMO-DB dataset. In a 5-fold cross-validation method, the proposed hybrid model achieved an unweighted accuracy (UA) of 83.73%, demonstrating a 7.8% increase in unweighted accuracy compared to the base model, while reducing feature dimensionality by 54.8%. These results confirm that the proposed hybrid model provides high accuracy and efficient feature representations.

Anahtar Kelimeler

• Speech emotion recognition
• Attention mechanism
• Metaheuristic optimization

Kaynakça

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